Csharp Tunit

If you're writing C# unit tests with TUnit, this skill covers the practical stuff you need to know. It walks through TUnit's async assertion syntax like `await Assert.That(value).IsEqualTo(expected)`, shows how to use `[Arguments]` and `[MethodData]` for data-driven tests, and explains TUnit's lifecycle hooks from `[Before(Test)]` to `[After(Assembly)]`. The migration guide from xUnit is solid, mapping `[Fact]` to `[Test]` and explaining how TUnit's parallel execution works by default. TUnit feels like a modern take on unit testing with better fluent assertions, though the async-everywhere approach takes some getting used to.